GliderPRO/Sources/Grease.c

//============================================================================
//----------------------------------------------------------------------------
//								   Grease.c
//----------------------------------------------------------------------------
//============================================================================


#include "Externs.h"
#include "Environ.h"
#include "MainWindow.h"
#include "Objects.h"
#include "RectUtils.h"
#include "Room.h"


#define kGreaseIdle			0
#define kGreaseFalling		1
#define kGreaseSpreading	2
#define kGreaseSpiltIdle	3


void BackupGrease (Rect *, short, Boolean);


greasePtr	grease;
short		numGrease;

extern	hotPtr		hotSpots;
extern	savedType	savedMaps[];
extern	Point		shieldPt;
extern	Rect		greaseSrcRt[], greaseSrcLf[], shieldRect;


//==============================================================  Functions
//--------------------------------------------------------------  HandleGrease

// Goes through all grease objects currently on screen and handles<65>
// them.  If they're upright, nothing happens, but if they're in<69>
// the course of falling or spilling, this function will handle<6C>
// advancing the spill, etc.

void HandleGrease (void)
{
	Rect		src;
	short		i;
	
	if (numGrease == 0)
		return;
	
	for (i = 0; i < numGrease; i++)
	{
		if (grease[i].mode == kGreaseFalling)
		{
			grease[i].frame++;
			if (grease[i].frame >= 3)		// grease completely tipped
			{
				grease[i].frame = 3;
				grease[i].mode = kGreaseSpreading;
				hotSpots[grease[i].hotNum].action = kSlideIt;
				hotSpots[grease[i].hotNum].isOn = true;
				if (grease[i].isRight)
					QSetRect(&src, 0, -2, 2, 0);
				else
					QSetRect(&src, -2, -2, 0, 0);
				QOffsetRect(&src, -playOriginH, -playOriginV);
				QOffsetRect(&src, grease[i].start, grease[i].dest.bottom);
				hotSpots[grease[i].hotNum].bounds = src;
			}
			
			QSetRect(&src, 0, 0, 32, 27);
			QOffsetRect(&src, 0, grease[i].frame * 27);
			CopyBits((BitMap *)*GetGWorldPixMap(savedMaps[grease[i].mapNum].map), 
					(BitMap *)*GetGWorldPixMap(workSrcMap), 
					&src, &grease[i].dest, 
					srcCopy, nil);
			CopyBits((BitMap *)*GetGWorldPixMap(savedMaps[grease[i].mapNum].map), 
					(BitMap *)*GetGWorldPixMap(backSrcMap), 
					&src, &grease[i].dest, 
					srcCopy, nil);
			
			AddRectToWorkRects(&grease[i].dest);
			if (grease[i].isRight)
				QOffsetRect(&grease[i].dest, 2, 0);
			else
				QOffsetRect(&grease[i].dest, -2, 0);
		}
		else if (grease[i].mode == kGreaseSpreading)
		{
			if (grease[i].isRight)
			{
				QSetRect(&src, 0, -2, 2, 0);
				QOffsetRect(&src, grease[i].start, grease[i].dest.bottom);
				grease[i].start += 2;
				hotSpots[grease[i].hotNum].bounds.right += 2;
			}
			else
			{
				QSetRect(&src, -2, -2, 0, 0);
				QOffsetRect(&src, grease[i].start, grease[i].dest.bottom);
				grease[i].start -= 2;
				hotSpots[grease[i].hotNum].bounds.left -= 2;
			}
			
			{
				CGrafPtr	wasCPort;
				GDHandle	wasWorld;
				
				GetGWorld(&wasCPort, &wasWorld);
				
				SetGWorld(backSrcMap, nil);
				PaintRect(&src);
				
				SetGWorld(workSrcMap, nil);
				PaintRect(&src);
				AddRectToWorkRects(&src);
				
				SetGWorld(wasCPort, wasWorld);
			}
			
			if (grease[i].isRight)
			{
				if (grease[i].start >= grease[i].stop)
					grease[i].mode = kGreaseSpiltIdle;
			}
			else
			{
				if (grease[i].start <= grease[i].stop)
					grease[i].mode = kGreaseSpiltIdle;
			}
		}
	}
}

//--------------------------------------------------------------  BackupGrease
// This makes copies of the region of the screen the grease is about<75>
// to be drawn to.  It is called in the "set up" when a player has<61>
// just entered a new room.  The "grease jar falling over" animation<6F>
// is set up here.

void BackupGrease (Rect *src, short index, Boolean isRight)
{
	Rect		dest;
	short		i;
	
	QSetRect(&dest, 0, 0, 32, 27);
	for (i = 0; i < 4; i++)
	{
		CopyBits((BitMap *)*GetGWorldPixMap(backSrcMap), 
				(BitMap *)*GetGWorldPixMap(savedMaps[index].map), 
				src, &dest, srcCopy, nil);
		
		if (isRight)
		{
			CopyMask((BitMap *)*GetGWorldPixMap(bonusSrcMap), 
					(BitMap